EVOLUTION OF TRANSCRIBED AND SPACER SEQUENCES IN THE RIBOSOMAL-RNA GENES OF DROSOPHILA

被引:57
作者
TARTOF, KD
机构
[1] The Institute for Cancer Research, Philadelphia, PA 19111
关键词
D O I
10.1016/0092-8674(79)90268-X
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Examination of the ribosomal RNA (rRNA) genes of six sibling species that make up the D. melanogaster subgroup reveals that the nontranscribed spacer is highly conserved during evolution. Indeed, the spacer is at least as conserved as the transcribed rRNA sequence in four of the six species and only slightly less conserved in the others. These data support the hypothesis previously suggested (Tartof and Dawid, 1976) that selection has a significant role in maintaining the parallel evolution of genetically separate but homologous redundant gene clusters. © 1979.
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页码:607 / 614
页数:8
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